Widodo, Widodo, Anastasia M.L. Sinambela, and Bilman W Simanihuruk. 2018. “Growth and Yield Response of Sweet Corn (Zea Mays Saccharata Sturt) on Some Green Manure Tithonia Diversifolia and Dose of Em4”. Akta Agrosia 21 (2):61-66. https://doi.org/10.31186/aa.21.2.61-66.